dfirhub

ExchangeCve-2021-26855

Windowsv1

Author: Dennis Reneau

description

Exchange Server Vulnerability *.Compiled Files

paths

4 paths
› paths use Windows environment syntax

collection commands 

# PowerShell Artifact Collection Script
# Target: ExchangeCve-2021-26855
# Run as Administrator

#Requires -RunAsAdministrator

$ErrorActionPreference = "SilentlyContinue"
$DestBase = "D:\Evidence"

# Function to handle artifact collection with robocopy
function Collect-Artifact {
    param (
        [string]$SourceDir,
        [string]$FolderName,
        [string]$FileMask = "*"
    )
    $FullDest = Join-Path -Path $DestBase -ChildPath $FolderName
    robocopy "$SourceDir" "$FullDest" "$FileMask" /E /COPY:DAT /R:0 /W:0 /NP /NFL /NDL /NJH /NJS | Out-Null
}

# 1. Exchange Server Modified Compiled Files
Collect-Artifact -SourceDir "C:\Windows\Microsoft.NET\Framework*\v*\Temporary ASP.NET Files\" -FileMask "Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled" -FolderName "Exchange_Server_Modified_Compiled_Files"

# 2. Exchange Server Modified Compiled Files
Collect-Artifact -SourceDir "C:\inetpub\wwwroot\aspnet_client" -FileMask "Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled" -FolderName "Exchange_Server_Modified_Compiled_Files"

# 3. Exchange Server Modified Compiled Files
Collect-Artifact -SourceDir "C:\inetpub\wwwroot\aspnet_client\system_web\" -FileMask "Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled" -FolderName "Exchange_Server_Modified_Compiled_Files"

# 4. Exchange Server Modified Compiled Files
Collect-Artifact -SourceDir "C:\Program Files\Microsoft\Exchange Server\V15\FrontEnd\HttpProxy\owa\auth\" -FileMask "Regex:*.\b[a-zA-Z0-9_-]{8}\b.compiled" -FolderName "Exchange_Server_Modified_Compiled_Files"

Write-Host "Collection complete!" -ForegroundColor Green

› Save as .ps1 and run as Administrator. Use: powershell -ExecutionPolicy Bypass -File script.ps1

references